Asp net core 6 add multiple authentication schemes with multiple authorization

Introduction

ASP.NET is a popular programming language used for building web applications. It provides a framework for developing dynamic websites, web services, and web APIs. One of the key features of ASP.NET is its ability to authentication and authorization. In this article, we will explore how to add authentication schemes with multiple authorization in ASP.NET Core 6.

Authentication Schemes

Authentication schemes in ASP.NET Core define how users are authenticated. By default, ASP.NET Core supports authentication schemes such as cookies, JWT (JSON Web Tokens), and OAuth. However, you may need to add multiple authentication schemes to support different types of users or authentication providers.

To add multiple authentication schemes, you can use the AddAuthentication method in the ConfigureServices method of the Startup class. Here's an example:


public void ConfigureServices(IServiceCollection services)
{
    services.AddAuthentication()
        .AddCookie("Scheme1",  =>
        {
            // Configure options for Scheme1
        })
        .AddJwtBearer("Scheme2", options =>
        {
            // Configure options for Scheme2
        })
        .AddOAuth("Scheme3", options =>
        {
            // Configure options for Scheme3
        });
}

In the above example, we have added authentication schemes: Scheme1, Scheme2, and Scheme3. Each scheme is configured using the respective options.

Adding Authorization Policies

Authorization policies in ASP.NET Core define who can access certain or perform specific actions. By default, ASP.NET Core uses the attribute to apply authorization rules. However, you may need to add multiple authorization policies to handle different access requirements.

To add multiple authorization policies, you can use the AddAuthorization method in the ConfigureServices method of the Startup class. Here's an example:


public void ConfigureServices(IServiceCollection services)
{
    services.AddAuthorization(options =>
    {
        options.AddPolicy("Policy1", policy =>
        {
            // Configure policy requirements for Policy1
        });

        options.AddPolicy("Policy2", policy =>
        {
            // Configure policy requirements for Policy2
        });

        options.AddPolicy("Policy3", policy =>
        {
            // Configure policy requirements for Policy3
        });
    });
}

In the above example, we have added three authorization policies: Policy1, Policy2, and Policy3. Each policy is configured with its respective requirements.

Applying Authentication and Authorization

Once you have added the authentication schemes and authorization policies, you can apply them to your or actions using the [Authorize] attribute. Here's an example:


[Authorize(AuthenticationSchemes = "Scheme1", Policy = "Policy1")]
public IActionResult SecureAction()
{
    // Code for secure action
}

In the above example, the SecureAction method is secured using Scheme1 authentication scheme and Policy1 authorization policy. Only users who satisfy the requirements of both the authentication scheme and authorization policy can access this action.

Conclusion

In this article, we have explored how to add multiple authentication schemes with multiple authorization in ASP.NET Core 6. By adding multiple authentication schemes and authorization policies, you can handle different types of users and access requirements in your web . Remember to configure the options for each scheme and policy according to your specific needs.

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